from my_utils import file_util
from my_utils import str_util

ret1 = str_util.str_reverse("hello")
ret2 = str_util.substr("okmonkeymonkey",5,9)
print(ret1)
print(ret2)
file_util.print_file_info("test/cc.txt")
file_util.append_to_file("test/abc.txt",'\n898989989898989')